C#字符串使用密钥进行加解密

第一个为大家分享的是C#字符串使用密钥进行加解密代码，具体内容如下

public class DesEncrypt
  {
    /// 

    /// 算法偏移量
    /// 
    const string m_IV = "12345678";
 
    /// 

    /// 功能描述:根据输入的密钥生成8位密钥
    /// 作　　者: 爱给模板网 2gei.cn
    /// 创建日期:2015-07-20 17:25:26
    /// 
    /// strkey
    /// 8位密钥
    private static string GetKey(string strkey)
    {
      if (string.IsNullOrEmpty(strkey))
      {
 strkey = "InfoColl";
      }
      if (strkey.Length % 8 == 0)
      {
 return strkey;
      }
      else
      {
 return GetKey(strkey + "0");
      }
    }
 
    /// 

    /// 功能描述:加密字符串
    /// 作　　者: 爱给模板网 2gei.cn
    /// 创建日期:2015-07-20 17:18:31
    /// 任务编号:
    /// 
    /// 原字符串
    /// 密钥
    /// 加密后的字符串
    public static string Encrypt(string strSourceString, string strKey)
    {
      strKey = GetKey(strKey);
      byte[] btKey = Encoding.UTF8.GetBytes(strKey);
 
      byte[] btIV = Encoding.UTF8.GetBytes(m_IV);
 
      DESCryptoServiceProvider des = new DESCryptoServiceProvider();
 
      using (MemoryStream ms = new MemoryStream())
      {
 try
 {
   byte[] inData = Encoding.UTF8.GetBytes(strSourceString);
   using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(btKey, btIV), CryptoStreamMode.Write))
   {
     cs.Write(inData, 0, inData.Length);
 
     cs.FlushFinalBlock();
   }
 
   return Convert.Tobase64String(ms.ToArray());
 }
 catch
 {
   return strSourceString;
 }
      }
    }
 
    /// 

    /// 功能描述:解密字符串
    /// 作　　者: 爱给模板网 2gei.cn
    /// 创建日期:2015-07-20 17:18:49
    /// 任务编号:
    /// 
    /// 原字符串
    /// 密钥
    /// 解密后的字符串
    public static string Decrypt(string strEncryptedString, string strKey)
    {
      strKey = GetKey(strKey);
      byte[] btKey = Encoding.UTF8.GetBytes(strKey);
 
      byte[] btIV = Encoding.UTF8.GetBytes(m_IV);
 
      DESCryptoServiceProvider des = new DESCryptoServiceProvider();
 
      using (MemoryStream ms = new MemoryStream())
      {
 try
 {
   byte[] inData = Convert.Frombase64String(strEncryptedString);
   using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(btKey, btIV), CryptoStreamMode.Write))
   {
     cs.Write(inData, 0, inData.Length);
 
     cs.FlushFinalBlock();
   }
 
   return Encoding.UTF8.GetString(ms.ToArray());
 }
 catch
 {
   return strEncryptedString;
 }
      }
    }
  }

C#字符串加密和解密

using System.Security.Cryptography;
using System.IO;
//默认密钥向量
    private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

    /// 

    /// DES加密字符串
    /// 
    /// 待加密的字符串
    /// 加密密钥,要求为8位
    /// 加密成功返回加密后的字符串，失败返回源串 
    public static string EncryptDES(string encryptString, string encryptKey)
    {
      try
      {
 byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));//转换为字节
 byte[] rgbIV = Keys;
 byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
 DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();//实例化数据加密标准
 MemoryStream mStream = new MemoryStream();//实例化内存流
 //将数据流链接到加密转换的流
 CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
 cStream.Write(inputByteArray, 0, inputByteArray.Length);
 cStream.FlushFinalBlock();
 return Convert.Tobase64String(mStream.ToArray());
      }
      catch
      {
 return encryptString;
      }
    }

    /// 

    /// DES解密字符串
    /// 
    /// 待解密的字符串
    /// 解密密钥,要求为8位,和加密密钥相同
    /// 解密成功返回解密后的字符串，失败返源串
    public static string DecryptDES(string decryptString, string decryptKey)
    {
      try
      {
 byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
 byte[] rgbIV = Keys;
 byte[] inputByteArray = Convert.Frombase64String(decryptString);
 DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
 MemoryStream mStream = new MemoryStream();
 CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
 cStream.Write(inputByteArray, 0, inputByteArray.Length);
 cStream.FlushFinalBlock();
 return Encoding.UTF8.GetString(mStream.ToArray());
      }
      catch
      {
 return decryptString;
      }
    }



      string EncryptStr = EncryptDESString.EncryptDES("aaaaaaaaaa", "ssssssss"); //返回加密后的字符串
      string DecryptStr = EncryptDESString.DecryptDES(EncryptStr, "ssssssss");//解密字符串

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。